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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style>
.welcom {
    color: red;
    font-size: 50px;
    text-align: center;
    width: 100%;
}
</style>
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<body background="image/bg2.jpg">
<div class="welcom">
欢迎来到线性代数几何意义演示平台
</div>
</body>
</html>
